diff --git a/src/schemas/invoices.schema.ts b/src/schemas/invoices.schema.ts
index 69c01b3..b6ae94f 100644
--- a/src/schemas/invoices.schema.ts
+++ b/src/schemas/invoices.schema.ts
@@ -50,6 +50,11 @@ export const CreateInvoiceSchema = z.object({
   // Rich-text CZ/EN "Obsah" sections rendered after the items on the PDF
   // (mirrors issued orders — shared DocumentSectionSchema, DB-aligned limits).
   sections: z.array(DocumentSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's PDF.
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(200)
+    .optional(),
 });
 
 export const UpdateInvoiceSchema = z.object({
@@ -74,6 +79,10 @@ export const UpdateInvoiceSchema = z.object({
   paid_date: nullableIsoDateString,
   items: z.array(InvoiceItemSchema).optional(),
   sections: z.array(DocumentSectionSchema).optional(),
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(200)
+    .optional(),
 });
 
 export type CreateInvoiceInput = z.infer<typeof CreateInvoiceSchema>;
diff --git a/src/schemas/issued-orders.schema.ts b/src/schemas/issued-orders.schema.ts
index e628764..f570c47 100644
--- a/src/schemas/issued-orders.schema.ts
+++ b/src/schemas/issued-orders.schema.ts
@@ -41,6 +41,12 @@ export const CreateIssuedOrderSchema = z.object({
   // Rich-text CZ/EN sections rendered on their own PDF page (mirrors offers'
   // scope_sections — shared DocumentSectionSchema, DB-aligned limits).
   sections: z.array(DocumentSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's
+  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(200)
+    .optional(),
 });
 
 // Update = partial create MINUS the number: PO numbers are immutable
diff --git a/src/schemas/offers.schema.ts b/src/schemas/offers.schema.ts
index 4fec4d9..5a52677 100644
--- a/src/schemas/offers.schema.ts
+++ b/src/schemas/offers.schema.ts
@@ -48,6 +48,12 @@ export const CreateQuotationSchema = z.object({
   scope_description: z.string().max(8000).nullish(),
   items: z.array(QuotationItemSchema).optional(),
   sections: z.array(ScopeSectionSchema).optional(),
+  // Positional indices of company custom fields to print on this document's
+  // PDF. Omitted/empty ⇒ none. Update schema derives via .partial().
+  selected_custom_fields: z
+    .array(z.number().int().nonnegative())
+    .max(200)
+    .optional(),
 });
 
 // Update = partial create MINUS the number: quotation numbers are immutable